Variable gearing.



E. G. STAUDE.

VARIABLE GEARING. APPLICATION'FILED MAR. 10. 19m.

Patented Apr. 25, 1916.

2 SHEETS -SHEET I.

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EDWIN GUSTAVE STAUDE, OF MINNEAPOLIS, MINNESOTA, ASSIGII' OR TO E. G. STAUDE MANUFACTURING 00., F MINNEAPOLIS, MINNESOTA, A CORPORATION.

vAnrABLn GEARING.

madam.-

. Specification of Letters Patent.

Patented-Apr. 25, rule.

' To all whom it may concern:

Be it known-that I, EDWIN G. STAUDE, of

. Minneapolis, Henn'epin county, Minnesota,

.the following isa specification.

have invented certain new and useful Improvements in 'Variable Gearing, of which The object of my invention isto provide a mechanism which shall-be positively gear driven and still permit the driving and driven shafts to run at variable speeds.

A further object is to provide a device which shall be exceedingly simple in construction.

A further object is to provide an arrangement permitting large and substantial bearings to all moving parts.

A further object is to provide a construction which will automatically and immediately stop the driven shaft when through either an accident or otherwise the controlling means shall have become broken.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

Inthe accompanying drawings, forming part of this specification, Figure 1 is a cross section of the variable speed gearing, Fig.

2 is a view substantially on the line m-0'a, of Fig. 1, looking in the direction of the arrow, Fig. 3 is a similar view showing the speed controlling cam in its extreme eccen' trio or stop position, Fig. 4 is a section on the line y-y of Fig. 3, Figs. 5 and 6 are details showing a method of operating the speed controlling cam.

In the drawing, 2 represents a suitable base whereon is mounted the standard 3 having a bearing 4 in which rotates the driven shaft 5 and at the end of which is the driven pinion 6. At the upper end of the base 2 I provide a bearing 7 to support the driving shaft 8. Mounted on the inner end of this driving shaft is-a disk 9 having a flange 10 adapted to perform the function of a pulley and at the same time inclos e the gearing within. It is, of course, obvious that the disk 9 may either be driven; through the shaft 8 or by a belt on the flange 10. Mounted within the case formed by the disk 9 and the flange 10 are a series of gear sectors which I indicate by reference figure 11. These gear sectors are pivoted on studs 12, which are secured to the disk 9 at points 13. The sector gears are all pivoted in a circle '16. This disl(16 is mounted on a bearing 17 which is concentric to the driving shaft 8 and eccentric to the driven shaft 5. For 'convenlence, this bearmg is formed integral with the standard 3. The speed controlling disk has a further bearing 18 above and below the bearing 17 and is held in place by plates 19 fastened by suitable screws. 20. The speed controlling disk 16 has a depending arm 21 at the lower end of which is the threaded portion 22 having a nut 23 which operates an integral gear 24. A pinion 25 with a shaft 26 and a crank 27 form means for adjusting the speed controllingdisk.

I have shown in the drawings the shaft 8 eccentric to the shaft 5', preferably in a direction of 45 degrees to a line drawn parallel with the movement of the controlling disk. The'purpose of this is that as the sector gears mounted on the disk 9 revolve about the center of the shaft 8, they will come in dontact with the gear or driven pin-. ion 6 during only a part of their revolution.

It is obvious that any one skilled in the art could easily provide a construction whereby both the driven and the driving shaft would be concentric, but, through a mechanical means move the studs 12 toward and away from the gear 6 at predetermined intervals, and in that way accomplish the same result, as herein shown In controlling the movement of-the sector gears 11, through the medium of the roller 14 operating in the groove 15, I find that it is essential that the roller 14 be placed in a position so that when the speed controlling, disk is in a position concentric to the shaft 8, the rollers 14 will then travel on the line described by the center of the stud 12. The distance that the roller 14 should be from the center of the stud 12 is a certain relative proportion of the diameter of the speed controlling disk. In order to produce a continuous and uniform movement of the driven gear 6 it is necessary that theface of the sector pinions 11 travel at a continuous and uniform speed while they are in mesh with the gear 6, and to accomplish this result the roller 14, as above stated, travels on aline which is described by the stud forming the pivot for the sector gear 11 only when the speed connot be continuous and uniform and to obviate this I find that by placing the roller condition' op1i osite that of the action of the Controlling disk. In other. words, when the trolling cam is placed in a concentric position to the shaft 8. In this position the sector gears will revolve with the-disk 9 but controlling disk: As the. throw of the ec centric is greatest at a polnt at rightangles to a line drawn through the lowest. and highest point, it would follow that the roller 14 would have a motion which would 14 in the position above described with relation-to the stud 12, I create 1n effect a controlling disk is at the limit of its movethat they. are going into mesh and until they are completely out of mesh again, will have ment the position of the roller 14 on the sectorgear is such'that it will be at the point of least movement; also \vhen the speed of the controlling disk is at the point of itsleast movement, the face of the sectorgear will be at the extreme limit of its movement. I am able, therefore to get acon-q' stant, uniform surface speed on the sector gear 11 and the velocity, of this speed will depend entirely onthe position of the controlling disk 16 but, whatever its position,

the face of the sector gears during the time a constant,'uniform speed. By placing the speed controlling disk, in the position shown in Fig; 3,-the sector gear 11 is placed in its upward position justbefore entering into mesh with the gear 6, and the path of the groove ,15 is such that the roller will be permitted to travel outward and away from the center of the disk 9"at such a speed which will permit the sector gear 11 to revolve on its axis at suitable speed to allow the gear 6 to remain stationary. Should,

however, the speed controlling disk be.

moved toward the center of the disk- 9, the

. 14 is retarded over that of the previous roller-14 will not have the required movement to permit the gear 6 to remain stationary, but'will advance the gear 6 the difference between the movement that the roller position of the speed controlling disk. I have shownfive sector gears mounted I on the disk 9, but, it is obvious that where v might use two disks and secure-them upon heavy duty is, required I can offset the sector' gears in such amanner-that I would haveroom for 8' or 10 on the disk 9, or I a shaft at a point-so that the center of the sectors on one disk will comebetween'the centers of the sectors on the other disk. I

have shown the sector gears operating on a pinion having teeth on its external surface,

equally well if I use an internal gear and provide teeth on opposite sides of the sector gears as long as I keep the surface speed of the sector gears constant during the time that they are in mesh with the driven gear.

I clai1n as my invention: 1. The combination, with a driving shaft,

of a disk secured thereon, gear sectors pivoted on said disk, a driven shaft and a pinion thereon adapted to mesh with said gear sectors, a speed controlling disk concentric with said driving shaft and eccentric with respect to said driven shaft and operatively connected with said sectors to oscillate the same on their pivots, for the purpose specified.

2. The combination, with a. driving shaft, of a disk secured thereon, gear sectors pivoted on said disk around said shaft, a driven shaft and a pinion thereon adapted to mesh with said gear sectors, a speed controlling disk mounted concentrically with respect to said driving shaft and eccentrically with respect to said driven shaft, said speed controlling disk having'an" annular groove in itsface, and saidsectors having anti-friction rollers and bearings therefor fitting within said groove, for the purpose specified.

3. The combination, with a driving shaft, of a disk secured thereon, gear sectors piv oted on said disk, a driven shaft and a pinion thereon adapted to mesh with said gear sectors, a speed controlling disk eccentrically mounted with respect to said driven shaft, said speed controlling disk having operative connections with saidgear sectors, and means for adjusting said speed controlling disk to vary its degree of eccentricity with respect to said driven shaft.

4. The combination, with a driving shaft and a disk secured thereon, of a series of gear sectors pivoted at intervals on said disk around said shaft, a driven shaft a pinion thereon adapted to mesh with said gear sectors, a speed controlling disk eccentri cally mounted with respect to said driven shaft and having an annular groove antifriction rollers mounted on saidgear sectors, said speed controlling diskbeing capable of a vertical movement in its bearing to change its degree of eccentricity with re spect to said driven shaft, for the purpose specified.

5. The combination, with a driving shaft, and a disk secured thereon, of a series of gear sectors pivoted at intervals on said disk around said shaft, a driven shaft a pinion thereon adapted to mesh with said gear sectors, a speed controlling disk eccentrically mounted with espect to said driven shaft itli said gear sectors to os-' cillate the same, and means for shifting. said speed controlling disk to changeits deand connected gree of eccentricity with respect to said driven shaft, for the purpose specified.

6. The combination, with a driving shaft,

of a series of gear sectors pivotally connected with said shaft and driventhereby, a driven shaft and a pinion thereon adapted to mesh with said gear sectors, a speed controlling means concentric with said driving shaft and eccentrically mounted with re spect to said driven shaft,- said speed con trolling means being operatively connected with saidsectors to oscillatethe same, substantially as described.

7. The combination, with a driving shaft, of a disk secured thereon, gears pivoted on said disk, a driven shaft and a pinion there on adapted to mesh with said gears, a speed controlling means concentrically mounted with respect. to said driving shaft and eccentrically mounted with respect tosaid driven shaft and operatively connected with said gears, for the purpose specified.

8, The combination, with a driving shaft and a disksecured thereon, of a series of gear sectors pivotally mounted on said disk, a driven shaft and a pinion thereon, said gear sectors being adapted to mesh at intervals with said pinion and arranged in a circle on said disk concentric with said driving shaft and eccentric with respect to said driven shaft, a speed controlling disk eccentrically mounted on said driven shaft and concentrically arranged with respect to said driving shaft, said speed controlling disk having; an annular groove therein and saidgear sectors having anti-friction rollers fitting within said groove, and means for shifting said speed controlling disk to change its degree of eccentricity with respect to'said driven shaft.

9. The combma'tlon, wlth a driving shaft, of p voted gear sectors mounted to revolve therewith, a driven shaft having a pinion to shaft, and a speed controlling means operatively connected with said gears.

11'. The combination, with a driving shaft,ofpivoted gears mounted to revolvetherewith, a driven shaft having a driving connection wlth sald gears, a speed controlling means operatlvely connected with said gears, and means for, shifting said speed controlling means.

In witness whereof T have'hereunto set my hand this 7 day of March 1910.

EDl/VIN GUSTAVE' STAUDE.

Witnesses J. A. BYRNns, L. (l CRONEN. 

